/Engine/Plugins/Importers/USDImporter/Source/USDClasses/Public/USDAssetUserData.h
[UCLASS](Programming/UnrealArchitecture/Reference/Classes#classdeclaration)() class UUsdAnimSequenceAssetUserData : public [UUsdAssetUserData](API\Plugins\USDClasses\UUsdAssetUserData)
float
LayerStartOffsetSeconds
Offset into the stage in seconds to when this AnimSequence should start playing to match the skeletal animation in that stage.